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Detailed introduction to the default position of child tags in css parent tags

高洛峰

Release： 2017-03-20 16:29:53

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This article shares a detailed introduction to the default position of the child tag in the css parent tag

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
.a{
width: 100px;
height: 100px;
background: red;
position: relative;
top: 40px;
left: 50px;
padding: 30px;
}
.b{
width: 50px;
height: 50px;
background: bisque;
position: absolute;
}
</style>
</head>
<body>
<p class="a">
<p class="b"></p>
</p>
</body>
</html>

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If you do not set top and left for the b tag. They will have a default value.

top and left will be positioned based on width and height.

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